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1 virtual void reconfigure(int full = -1, int empty = -1,
2 logic fill_as_bytes = 1'bx);
3 virtual int unsigned full_level();
4 virtual int unsigned empty_level();
5 virtual int unsigned level();
6 virtual int unsigned size();
7 virtual bit is_full();
8 function void flush();
9 function void sink();
10 function void flow();
11 function void lock(bit [1:0] who);
12 function void unlock(bit [1:0] who);
13 function bit is_locked(bit [1:0] who);
14 function void display(string prefix = "");
15 function string psdisplay(string prefix = "");
16 task put(vmm_data obj, int offset = -1);
17 function void sneak(vmm_data obj, int offset = -1);
18 function vmm_data unput(int offset = -1);
19 task get(output vmm_data obj, input int offset = 0);
20 task peek(output vmm_data obj, input int offset = 0);
21 task activate(output vmm_data obj, input int offset = 0);
22 function vmm_data active_slot();
23 function vmm_data start();
24 function vmm_data complete(vmm_data status = null);
25 function vmm_data remove();
26 function active_status_e status();
27 function bit tee_mode(bit is_on);
28 task tee(output vmm_data obj);
29 function void connect(vmm_channel downstream);
30 function vmm_data for_each(bit reset = 0);
31 function int unsigned for_each_offset();
32 function bit record(string filename);
33 task playback(output bit success, input string filename,
34 input vmm_data loader, input bit metered = 0);
You could download file vmm_channel_methods.sv here
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1 `include "vmm.sv"
2
3 // Note : This is not exact representation of AHB data class
4 // All data class needs to extend from vmm_data
5 class ahb_data extends vmm_data;
6 vmm_log log;
7 // You should use enum, when needed
8 typedef enum {OKAY,ERROR,RETRY,SPLIT} rsp_t;
9 typedef enum {IDLE,BUSY,NONSEQ,SEQ} tnr_t;
10 typedef enum {WRITE,READ} cmd_t;
11 typedef enum {SINGLE,INCR,WRAP4,INCR4,WRAP8,INCR8,WRAP16,INCR16} burst_t;
12
13 // Declare all the fields
14 rand bit [31:0] addr;
15 rand bit [31:0] data [16];
16 rand bit [3:0] beats;
17 rand tnr_t transfer;
18 rand rsp_t response;
19 rand cmd_t cmd;
20 rand burst_t burst;
21
22 // Make sure all variables have init value
23 function new(vmm_log log);
24 int i;
25 super.new(log);
26 this.log = log;
27 this.addr = 0;
28 for (i = 0; i < 16; i ++) begin
29 this.data[1] = 0;
30 end
31 this.beats = 0;
32 this.transfer = IDLE;
33 this.response = OKAY;
34 this.cmd = WRITE;
35 this.burst = SINGLE;
36 endfunction
37
38 // Print message
39 function void display(string prefix = "");
40 if (is_valid()) begin
41 `vmm_debug(log,$psprintf("%s",psdisplay(prefix)));
42 end else begin
43 `vmm_error(log,$psprintf("%s",psdisplay(prefix)));
44 end
45 endfunction
46
47 // Return the string members and their values
48 virtual function string psdisplay(string prefix = "");
49 string msg;
50 int i;
51 msg = $psprintf(" %s\n", prefix);
52 msg = $psprintf("%s ADDRESS : 32'h%x\n",msg,addr);
53 msg = $psprintf("%s COMMAND : %s\n",msg,cmd.name());
54 msg = $psprintf("%s TRANSFER : %s\n",msg,transfer.name());
55 msg = $psprintf("%s RESPONSE : %s\n",msg,response.name());
56 msg = $psprintf("%s BEATS : %0d\n",msg,beats);
57 msg = $psprintf("%s BURST : %s\n",msg,burst.name());
58
59 for (i = 0; i < beats; i++) begin
60 msg = $psprintf("%s DATA[%2d] : 32'h%x\n",msg,i,data[i]);
61 end
62 psdisplay = msg;
63 endfunction
64
65 virtual function bit is_valid(bit silent = 1, int kind = -1);
66 is_valid = (response ! = ERROR);
67 endfunction
68
69 virtual function vmm_data copy(vmm_data to = null);
70 ahb_data cpy;
71 int i;
72 if (to == null) begin
73 cpy = new (log);
74 end else begin
75 if ( ! ($cast(cpy,to))) begin
76 `vmm_fatal(log,"Passed pointer to copy method is not of type ahb_data");
77 end
78 end
79 cpy.addr = this.addr;
80 for (i = 0; i < 16; i ++) begin
81 cpy.data[i] = this.data[1];
82 end
83 cpy.beats = this.beats ;
84 cpy.transfer = this.transfer ;
85 cpy.response = this.response ;
86 cpy.cmd = this.cmd ;
87 cpy.burst = this.burst ;
88 copy = cpy;
89 endfunction
90
91 virtual function bit compare( vmm_data to, output string diff, input int kind = -1);
92 int cmp = 1;
93 ahb_data cp;
94 if (to == null) begin
95 `vmm_error(log,"Passed pointer to copy method is null");
96 return 0;
97 end else begin
98 if ( ! ($cast(cp,to))) begin
99 `vmm_fatal(log,"Passed pointer to copy method is not of type ahb_data");
100 end
101 end
102 if (addr ! = cp.addr) begin
103 diff = $psprintf("Expected 32'h%x Got 32'h%x",addr, cp.addr);
104 return 0;
105 end
106 if (beats ! = cp.beats) begin
107 diff = $psprintf("Expected 32'h%x Got 32'h%x",beats, cp.beats);
108 return 0;
109 end
110 // You can add reset of the code here
111 compare = cmp;
112 endfunction
113 endclass
114
115 // We need to add below line to construct vmm_channel for object ahb_data
116 `vmm_channel(ahb_data)
117
118 // This class generates transactions
119 // Don't worry about vmm_xactor, will will see them later
120 class source extends vmm_xactor;
121 vmm_log log;
122 ahb_data_channel fifo;
123
124 function new(vmm_log log,string name, ahb_data_channel fifo);
125 super.new(name, name);
126 this.log = log;
127 this.fifo = fifo;
128 endfunction
129
130 virtual task main();
131 int i;
132 ahb_data mdata;
133 super.main();
134 #10 ;
135 // Generate 2 transactions
136 for (i = 0; i < 2; i++) begin
137 mdata = new (log);
138 mdata.display("SOURCE");
139 fifo.sneak(mdata);
140 end
141 endtask
142
143 endclass
144
145 // This class sinks transactions
146 class sink extends vmm_xactor;
147 ahb_data_channel fifo;
148 vmm_log log;
149
150 function new(vmm_log log, string name, ahb_data_channel fifo);
151 super.new(name,name);
152 this.log = log;
153 this.fifo = fifo;
154 endfunction
155
156 virtual task main();
157 ahb_data d;
158 super.main();
159 while (1) begin
160 `vmm_note(log,$psprintf("Before Size of fifo is %0d",fifo.size()));
161 wait_if_stopped_or_empty(fifo);
162 `vmm_note(log,$psprintf("After Size of fifo is %0d",fifo.size()));
163 fifo.get(d);
164 d.display("SINK");
165 end
166 endtask
167 endclass
168
169 program test();
170 vmm_log log = new("vmm_log_test","ahb_data");
171 ahb_data_channel fifo = new ("CHANNEL","FIFO");
172 source src = new(log,"SOURCE",fifo);
173 sink snk = new(log,"SINK",fifo);
174
175 initial begin
176 snk.start_xactor();
177 src.start_xactor();
178 #1000 ;
179 end
180 endprogram
You could download file vmm_channel_ex.sv here
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